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{ Workflow } from \"./workflow.ts\";\nimport { WorkflowStorage } from \"./storage.ts\";\nimport { WorkflowSnapshot } from \"./types.ts\";\n\ninterface ApiWorkflowData {\n id: string;\n description?: string;\n steps: Array<{ id: string; description?: string }>;\n exampleInput?: Record;\n}\n\ninterface ApiRunData {\n runId: string;\n workflowId: string;\n status: \"running\" | \"success\" | \"failed\";\n executionPath: number[];\n stepResults: Record;\n inputData: unknown;\n result?: unknown;\n error?: string;\n createdAt: number;\n updatedAt: number;\n}\n\nexport class ApiServer {\n private workflows: Map; exampleInput?: Record }> = new Map();\n private storage: WorkflowStorage;\n\n constructor(storage: WorkflowStorage) {\n this.storage = storage;\n }\n\n registerWorkflow(\n workflow: Workflow,\n exampleInput?: Record,\n ) {\n this.workflows.set(workflow.id, { workflow: workflow as any, exampleInput });\n }\n\n private serializeWorkflow(workflowId: string): ApiWorkflowData | null {\n const entry = this.workflows.get(workflowId);\n if (!entry) return null;\n\n const { workflow, exampleInput } = entry;\n return {\n id: workflow.id,\n description: workflow.description,\n steps: workflow.steps.map((step) => ({\n id: step.id,\n description: step.description,\n })),\n exampleInput,\n };\n }\n\n private serializeRun(snapshot: WorkflowSnapshot): ApiRunData {\n return {\n runId: snapshot.runId,\n workflowId: snapshot.workflowId,\n status: snapshot.status,\n executionPath: snapshot.executionPath,\n stepResults: snapshot.stepResults,\n inputData: snapshot.inputData,\n result: snapshot.result,\n error: snapshot.error,\n createdAt: snapshot.timestamp,\n updatedAt: snapshot.timestamp,\n };\n }\n\n async handleRequest(request: Request): Promise {\n const url = new URL(request.url);\n const path = url.pathname;\n const method = request.method;\n\n // CORS headers\n const corsHeaders = {\n \"Access-Control-Allow-Origin\": \"*\",\n \"Access-Control-Allow-Methods\": \"GET, POST, OPTIONS\",\n \"Access-Control-Allow-Headers\": \"Content-Type\",\n \"Content-Type\": \"application/json\",\n };\n\n // Handle preflight requests\n if (method === \"OPTIONS\") {\n return new Response(null, { headers: corsHeaders });\n }\n\n try {\n // GET /api/workflows - List all workflows\n if (path === \"/api/workflows\" && method === \"GET\") {\n const workflows = Array.from(this.workflows.keys()).map((id) =>\n this.serializeWorkflow(id)\n ).filter((w): w is ApiWorkflowData => w !== null);\n\n return new Response(JSON.stringify(workflows), { headers: corsHeaders });\n }\n\n // GET /api/workflows/:id - Get workflow details\n const workflowMatch = path.match(/^\\/api\\/workflows\\/([^\\/]+)$/);\n if (workflowMatch && method === \"GET\") {\n const workflowId = workflowMatch[1];\n const workflow = this.serializeWorkflow(workflowId);\n\n if (!workflow) {\n return new Response(JSON.stringify({ error: \"Workflow not found\" }), {\n status: 404,\n headers: corsHeaders,\n });\n }\n\n return new Response(JSON.stringify(workflow), { headers: corsHeaders });\n }\n\n // GET /api/workflows/:id/runs - List runs for a workflow\n const runsMatch = path.match(/^\\/api\\/workflows\\/([^\\/]+)\\/runs$/);\n if (runsMatch && method === \"GET\") {\n const workflowId = runsMatch[1];\n const snapshots = await this.storage.listRuns(workflowId);\n const runs = snapshots.map((s) => this.serializeRun(s));\n\n return new Response(JSON.stringify(runs), { headers: corsHeaders });\n }\n\n // POST /api/workflows/:id/runs - Create a new run\n if (runsMatch && method === \"POST\") {\n const workflowId = runsMatch[1];\n const entry = this.workflows.get(workflowId);\n\n if (!entry) {\n return new Response(JSON.stringify({ error: \"Workflow not found\" }), {\n status: 404,\n headers: corsHeaders,\n });\n }\n\n const body = await request.json();\n const { inputData } = body;\n\n // Create and start the run in the background\n const run = await entry.workflow.createRun();\n\n // Start execution (don't await - let it run in background)\n run.start({ inputData }).catch((error) => {\n console.error(`Run ${run.runId} failed:`, error);\n });\n\n // Return the initial run state\n const snapshot = await this.storage.loadSnapshot(run.runId);\n if (!snapshot) {\n return new Response(JSON.stringify({ error: \"Failed to create run\" }), {\n status: 500,\n headers: corsHeaders,\n });\n }\n\n return new Response(JSON.stringify(this.serializeRun(snapshot)), {\n status: 201,\n headers: corsHeaders,\n });\n }\n\n // GET /api/runs/:runId - Get run details\n const runMatch = path.match(/^\\/api\\/runs\\/([^\\/]+)$/);\n if (runMatch && method === \"GET\") {\n const runId = runMatch[1];\n const snapshot = await this.storage.loadSnapshot(runId);\n\n if (!snapshot) {\n return new Response(JSON.stringify({ error: \"Run not found\" }), {\n status: 404,\n headers: corsHeaders,\n });\n }\n\n return new Response(JSON.stringify(this.serializeRun(snapshot)), {\n headers: corsHeaders,\n });\n }\n\n // 404 for unmatched routes\n return new Response(JSON.stringify({ error: \"Not found\" }), {\n status: 404,\n headers: corsHeaders,\n });\n } catch (error) {\n console.error(\"API Error:\", error);\n return new Response(\n JSON.stringify({ error: error instanceof Error ? error.message : \"Internal server error\" }),\n {\n status: 500,\n headers: corsHeaders,\n },\n );\n }\n }\n\n async serve(port = 8000) {\n console.log(`API server starting on http://localhost:${port}`);\n\n const server = Deno.serve({ port }, (request) => this.handleRequest(request));\n\n return server;\n }\n}\n\n// Helper function to create and configure an API server\nexport function createApiServer(storage: WorkflowStorage): ApiServer {\n return new ApiServer(storage);\n}\n","deleted","label",[170,153],"backend","permalink","https://www.val.town/x/nbbaier/wrkflw/code/backend/api-server.ts","extension","actionData","errors"]